sock

(noun) hosiery consisting of a cloth covering for the foot; worn inside the shoe; reaches to between the ankle and the knee.

(noun) a truncated cloth cone mounted on a mast; used (e.g., at airports) to show the direction of the wind. Synonyms: windsock, wind sock, air sock, air-sleeve, wind sleeve, wind cone, drogue.

(verb) hit hard. Synonyms: bop, whop, whap, bonk, bash.